Glean `data-glean-id` not working in shadow DOM

[caugner]

1. Go to https://developer.mozilla.org/en-US/curriculum/
2. Run Glean.setLogPings(true);
3. Click on Scrim.

Expected: to see Glean measurement in console (+ network tab)

Actual: no measurement

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[LeoMcA]

Fixing upstream in mozilla/glean.js#2013

@caugner since we've shipped our own fix, perhaps we should still close this? Have the glean pings shown up on redash?

[caugner]

since we've shipped our own fix, perhaps we should still close this? Have the glean pings shown up on redash?

Yes, they have! 🙂